Hi Krisz, build 1.14 is now ready for download. Sprut had a problem that occured when they uploaded to the server which is now solved.
I haven't had much of a chance to play with it yet, but the new capabilities for viewing the toolpaths in simulation mode are superb.

It now allows you to select for example, each Z layer of a waterline roughing strategy. This will be useful because if you have to stop machining to replace tips etc., rather that re-running the whole roughing again, you can now select a section of toolpath and delete it before postprocessing

Hi Krisz, try creating a waterline roughing strategy with your 'Step by Z' of 3mm. Then go to Simulation, and click the little red plus sign to the left of 'Roughing Waterline', you will then see the layers of the toolpath displayed at 3mm steps.